Is it safe and advisable to travel?

It is suggested that you should put aside any plan or intention to travel outside the US until your I-485 is adjudicated.

I am a permanent resident since june 08,i traveled out of the country 5 times,totaling 245 days,2and ahalf months is the longes

You should be fine. To be eligible, inter alia, you must have continuously resided in the US for 5 years and must have been physically present for...

What happens if my parents and my younger sibling are awarded with green cards and i get to stay in order to finish my studies?

Your question is unclear. If you are a student and over 21, you will need to remain in a valid F-1 status in order to be eligible to adjust your...

I-134......

Yes, if you intend to sponsor him during his stay here in the US; No, if he can show to the consular officer that he has the means to take care of...

How much is an income requirements?

It depends on his household size. You can check at www.uscis.gov. Also know that he needs to be domiciled in the US to be able to sponsor you.

Not long at all. If the website informs you that the card has been picked up by USPS, you can track it for the delivery date.

My step dad was arrested his case was dismissed and sealed today but he has a immigration warrant/hold I don't know what to do?

He needs an immigration lawyer without delay.

DS-230, Application for immigrant visa & alien registration.

Your wife will need to sign on his behalf. He is way too young to entirely understand the proceeding.

I-130 Q. C17 - "list spouse and all children of your relative" if my relative's wife is 7 moths pregnant what should I write?

Because he is an unborn child, he should not be listed as a child of your brother's even though he may qualify as a derivative beneficiary in the...

Student visa

You can apply for a student visa at the American Consulate in your country or for a change of status while in the US.